| National Weather Service Forecast for:
San Marcos CA Issued by: National Weather Service San Diego, CA |
||||||||||||||||||
| Updated: 12:29 am PDT Jun 22, 2026 | ||||||||||||||||||
|
| Overnight |
Patchy fog. Otherwise, mostly cloudy, with a low around 59. Calm wind. |
| Monday |
Patchy fog before 11am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 75. Light and variable wind becoming west 5 to 10 mph in the morning. Winds could gust as high as 20 mph. |
| Monday Night |
Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 60. West wind around 5 mph becoming calm in the evening. |
| Tuesday |
Patchy fog before 11am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 79. Light west wind increasing to 5 to 10 mph in the morning. |
| Tuesday Night |
Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 63. West wind around 5 mph becoming calm in the evening. |
| Wednesday |
Patchy fog before 11am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 81. |
| Wednesday Night |
Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 62. |
| Thursday |
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 80. |
| Thursday Night |
Increasing clouds, with a low around 60. |
| Friday |
Mostly cloudy, then gradually becoming sunny, with a high near 79. |
| Friday Night |
Increasing clouds, with a low around 59. |
| Saturday |
Mostly cloudy, then gradually becoming sunny, with a high near 78. |
| Saturday Night |
Increasing clouds, with a low around 61. |
| Sunday |
Cloudy through mid morning, then gradual clearing, with a high near 73. |
Forecast from NOAA-NWS for San Marcos CA.
